How to build an arch?
We first built the bases with holes. The upcoming blocks will have pegs to increase the strength, this process is called "clamping".
The first block was added.
One by one the blocks are assembled.
Here comes the important part
The keystone is crucial to the stability of the arch as the keystone is responsible for the even load distribution of the arch, making the arch stand strong. The keystone has to be a wedge-shape, like a pizza so the distribution to both sides are even.
The first test: Arch withstand 1 phone and 2 clay blocks. When more load is added, the top of the arch started showing strain and cracked. We stopped the test after that.
Pushing the arch towards the ground to amplify the effect of the keystone. More like attempting to save the arch.
I suggested to the group to add a support beam and rings to increase the arch structural strength. This addition worked marvelously.
Final test: The arch managed to withstand the load of 4 smartphones and a block of clay. We didn't add further load to test the failing point because the group test ended after that weight load. The failing point of the arch is unknown.
Personal Conclusion
- The arch managed to withstand the load of 1 smartphone and clay block until cracks surfaced during the building phase.
- I suggested to add the support beams and rings. The extra support increased the arch strength.
- During load test, the arch managed to hold the weight of until 4 smartphones and a clay block up to 50 seconds.
- Hidayah's arch collapsed with the weight of 3 smartphones.
- KY's and our arch survived the load test and the test was ended.
- For the seismic test, in my opinion the test was a bit extreme because I titled the table a little bit too much.
- One by one arches collapsed.
- At one point, the right side of the column of our arch snapped, but didn't collapse yet.
- When the test continued, the right side of the column failed and the base flew off the table, bringing down the whole arch with it.
- Our arch is placed 5th our of all arches.
- The keystone was important during the construction of the arch, or else it will fail. It is too big or too small, the weight distribution wont be even.
- We should have repaired ours after the load tests like everyone else, otherwise our arch might have lasted longer during the seismic test.
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